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How to read vectors

Joshcannon (84)
How do I take a vector such as:

< (2,c) (4,T) (3,R) >
and print out a dynamic array such as this:

0---C
1---C
2---T
3---T
4---T
5---T
6---R
7---R
8---R

Just point me in the right direction, its homework. Thanks.
Last edited on
Joshcannon (84)
just basically wondering how to start it.
Joshcannon (84)
bump
booradley60 (896)
Can you show the code that creates that vector?
Joshcannon (84)
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#include <iostream>
#include <cstdlib>
#include <vector>
#include <utility>
using namespace std ;

// --------------------------------------------------------------------------

void generateRandomPairs ( vector< pair<unsigned int,char> > & pairVector )
{
    unsigned int randSeedValue ;
    cout << "\nEnter random number generator seed value: " ;
    cin >> randSeedValue ;
    srand ( randSeedValue ) ;
    unsigned int numberOfPairs = (rand() % 4 + 3) ;
    pairVector.clear() ;
    for ( unsigned int i = 1 ; i <= numberOfPairs ; i ++ )
    {
        unsigned int randomCount = (rand() % 4 + 1) ;
        char randomUppercase = (rand() % 26 + 'A') ;
        pair<unsigned int,char> randomPair ( randomCount, randomUppercase ) ;
        pairVector.push_back ( randomPair ) ;
    } // end for loop
} // end generateRandomPairs function

// --------------------------------------------------------------------------

void printRandomPairs ( const vector< pair<unsigned int,char> > & pairVector )
{
    cout << "\nThe vector of ordered pairs is ...\n\n\t< " ;
    for ( unsigned int i = 0 ; i < pairVector.size() ; i ++ )
    {
        pair<unsigned int,char> numberLetterPair = pairVector.at(i) ;
        cout << '(' << numberLetterPair.first << ',' << numberLetterPair.second << ") " ;
    } // end for loop
    cout << ">\n\n" ;
} // end printRandomPairs function

// --------------------------------------------------------------------------

int main ()
{
    vector< pair<unsigned int,char> > pairVector ; // initially empty
    generateRandomPairs ( pairVector ) ;
    printRandomPairs ( pairVector ) ;
    
    
    
    
    
    
    cout << "The dynamic array contains ...:\n";
    cout << " " << endl;
    cout << "Index       Value";
    cout << "-----       -----";
    cout << 
    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - //
    // HERE, STUDENT IS TO INSERT C++ CODE THAT ...                                    //
    //   1. CREATES A DYNAMIC ARRAY TO STORE LETTERS AS DESCRIBED IN PDF FILE          //
    //      (DYNAMIC ARRAY MUST BE LARGE ENOUGH TO STORE ALL LETTERS, BUT NO LARGER)   //
    //   2. POPULATE THE DYNAMIC ARRAY WITH LETTERS AS DESCRIBED IN PDF FILE           //
    //   3. PRINTS THE CONTENTS OF THE ARRAY AS ILLUSTRATED IN PDF FILE                //
    //   4. DEALLOCATES THE DYNAMIC ARRAY THAT WAS CREATED IN STEP 1                   //
    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - //
    
} // end main function

// --------------------------------------------------------------------------
rafae11 (264)
do you have to parse < (2,c) (4,T) (3,R) > and then generate a vector.
maybe i don't understand the problem exactly but this is how i did it.

http://cpp.sh/8hie
Last edited on
Joshcannon (84)
Basically just what you have but the array should be dynamic. You shouldn't have to input the contents like you did.
rafae11 (264)
try this.

http://cpp.sh/4emo
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